155213140 has 24 divisors (see below), whose sum is σ = 327906432. Its totient is φ = 61712160.

The previous prime is 155213119. The next prime is 155213141. The reversal of 155213140 is 41312551.

It is a happy number.

It is a super-2 number, since 2×155213140² = 48182237657319200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155213141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19896 + ... + 26575.

It is an arithmetic number, because the mean of its divisors is an integer number (13662768).

Almost surely, 2^155213140 is an apocalyptic number.

155213140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155213140 is an abundant number, since it is smaller than the sum of its proper divisors (172693292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155213140 is a wasteful number, since it uses less digits than its factorization.

155213140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46647 (or 46645 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 155213140 is about 12458.4565657227. The cubic root of 155213140 is about 537.4146422955.

Adding to 155213140 its reverse (41312551), we get a palindrome (196525691).

The spelling of 155213140 in words is "one hundred fifty-five million, two hundred thirteen thousand, one hundred forty".